Disazo dye



Patented Oct. 13, 19 25.

I To all whom it may concern.

UNITED STATES RICHARD c. MILLER, or wmrmLn, LONG ISLAND,-1\TEW.YORK, AssIoNoB. or ONE HALF T0 rocn BROTHERS, INCORPORATED, OF-NEW Yonx, N. Y.,- A conronarron OF NEW YORK.

DISAZO DYE.

No Drawing.

Be it known that I, RICHARD C. MILLER, a citizen of the United States, residing at Winfield, Long Island, in the county of Queens and State of New York, have invented certain new and useful Improvements in Disazo Dyes, of which the following is a specification. I

This invention relates to dyes which are fast to light and insoluble in water but sufiiin which two of the Xs stand for methyl groups, two of the Ys stand for methyl groups and one of the Zs stands for acarboxyl group.

The invention is illustrated inthe following specific example: 25 parts by weight ofpara-amino-azoxylene having the formula:

: *Cf g PATENT oFF1 Application filed November 29, 1924. Serial No. 752,934.

ciently soluble in non-aqueous materials such as waxes, oils, spirits, rubber, rubber substitutes, celluloid solvents, lacquers and the like, that they may be used for coloring such materials. v

The dyes of my invention are compounds prepared by combining the diazo compounds of para-aminmazoxylenes withbetahydroxynaphthoic acids and have in the free state most probably the following formula:

tion of 20 parts by weight of betahydroxynaphthoicacid on. coon- It is soluble in concentrated sulfuric acid to a blue color. It is very insoluble in water butjdiss olves readily in non-aqueous mate-- rials such as waxes, oils, etc.,'producing a brilliant red color with a deep blue undertone fast to light. .The product of the foregoing example in its free state has most probablythe formula:

on coon,

, c ig gwg I claim naphthoic acids, said products being in- 1. As new products, compounds formed soluble in water, fast to light, and soluble in by the combination of the diazo compounds non-aqueous materials and having in the of para-aminoazoxylenes with betahydroxyfree state most probably the formula:

in which two of the Xs stand for methyl 2. An oil soluble dye having in itsv free 10 groups, two of the Ys stand for methyl state most probably the formula:

groups, and one of the Zs stands for a'carboxyl group.

I v cm 7 l CBQN=N N=N H: CH!

In testimony whereof,I aflix my signature. j RICHARD C. MILLER. 

